INTERNATIONAL ONLY Vessel "A" is overtaking vessel "B" on open waters as shown in illustration D017RR below and will pass without changing course. What action should Vessel "A" take?

Correct Answer: Option A — Need not sound any whistle signals

COLREGS Rule 34(a) states that whistle signals are only required when vessels are in sight of one another and are actively altering course. Since the overtaking vessel is passing without changing course, no whistle signal is required. The rules do not mandate communication for simple overtaking maneuvers on open water.